1290 BULLETIN 02, UNITED STATES NATIONAL MUSEUM. 



TRIGONOGRAPTUS— Continued. 



Trigonograptus Zittel, Handb. Pal., 1, 1879, p. 302. — Koken, Die Leitfossilien, 

 Leipzig, 1896, p. 329.— Roemer and Freeh, Leth. geog., 1 Theil, Leth. Pal., 1, 

 3 Lief, 1897, p. 624.— Ruedemann, Mem. New York State Mus., 7, pt. 1, 1904, 



pp. 726, 727. 



Trigonograptus ensiformis (Hall). 



Graptolithus ensiformis Hall, Geol. Surv. Canada, Rep. Progr. for 1857, 1858, p. 



133; Canadian Nat. Geol., 3, 1858, p. 167. 

 Retiolites ensiformis Hall, Geol. Surv. Canada, dec. 2, 1865, p. 114ff, pi. 14, figs. 



1-5.— Roemer and Freeh, Leth. geog., 1 Thiel, Leth. Pal., 1, 3 Lief., 1897, p. 



667, footnqte. 

 Trigonograptus ensiformis Hopkinson and Lapworth, Quart. Jour. Geol. Soc., 31, 



1875, p. 659ff, pi. 34, figs. 8a-c.— Ami, Rep. Geol. Surv. Canada, 2d ser., 3, 



pt. 2, 1889, p. 117k.— Nicholson, Geol. Mag., 3d ser., 7, 1890, pp. 340, 341, figs. 



1, 2.— Elles, Quart, Jour. Geol. Soc. London, 54, 1898, pp. 523, 524, fig. 34 — 



Ruedemann, Ann Rep. New York State Pal., 1902, p. 571; Mem. New York 



State Mus., 7, pt. 1, 1904, pp. 727-729, pi. 17, figs. 1-9. 

 Canadian: Point Levis, Quebec (Levis, Diplograptus dentatus zone); Deepkill, 



Rensselaer County, and Mount Moreno, New York (Deepkill, D. dentatus 



zone); Arkansas; England (Skiddaw). 



TRIGYRA Raymond. Genotype: T. ulrichi Raymond. 



Trigyra Raymond, Ann. Carnegie Mus., 4, 1908, p. 198. 



Trigyra ulrichi Raymond. 



Trigyra ulrichi Raymond, Ann. Carnegie Mus., 4, 1908, p. 198, pi. L, fig. 6. 

 Chazyan (Day Point): Isle La Motte, Vermont. 

 Holotype.—C&t. No. 53630, U.S.N.M. 



Tuilobites alatus Boeck. See Sphserophthalmus alatus. 



TRIMERELLA Billings. Genotype: T. grandis Billings. 



Trimerella Billings, Pal. Fossils, 1, 1862, p. 166.— Dall, Amer. Jour. Conch., 6, 1870, 

 p. 160; ibid., 7, 1871, p. 79. — Davidson and King, Quart. Jour. Geol. Soc. Lon- 

 don, 30, 1874, p. 143.— Dall, Bull. U. S. Nat. Mus., 8, 1877, p. 74.— Zittel, 

 Handb. Pal., 1, 1880, p. 668— Miller, N. A. Geol. Pal., 1889, p. 386— Hall and 

 Clarke, Pal. New York, 8, pt. 1, 1892, pp. 33, 46, 163; 11th Ann. Rep. New 

 York State Geol., 1894, p. 236. — Koken, Die Leitfossilien, Leipzig, 1896, p. 

 231, fig. 190, 3.— Schuchert, Zittel-Eastman Textb. Pal., 1, 1900, p. 306; 2d ed., 

 1913, p. 373.— Whiteaves, Ottawa Nat., 16, 1902, p. 139.— Grabau and Shimer, 

 N. A. Index Fossils, 1, 1907, p. 191. 



Gotlandia Dall, Amer. Jour. Conch., 6, 1870, p. 160. 



Trimerella acuminata Billings. 



Trimerella acuminata Billings, Pal. Fossils, 1, 1862, pp. 167, 168, fig. 152; Amer. 

 Jour. Sci., 3d ser., 1, 1871, p. 471; Ann. Mag. Nat. Hist., 4th ser., 8, 1871, p. 

 140. — Dall, Amer. Jour. Conch., 7, 1871, p. 82. — Davidson and King, Quart. 

 Jour. Geol. Soc. London, 30, 1874, p. 146, pi. 15, figs. 4-7; pi. 16, figs. 1, 2.— 

 Nicholson, Pal. Prov. Ontario, 1875, p. 68, fig. 36.— Hall and Clarke, Pal. New 

 York, 8, pt. 1, 1892, pl.4B, fig. 6.— Whiteaves, Pal. Foss., Geol. Surv. Canada, 

 3, pt. 2, 1895, p. 54— Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 191. 

 Niagaran : Gait, New Hope, and Hespelar, Ontario ; near Hillsboro, Ohio (Guelph) ; 

 Port Byron, Illinois; Gotland and Faro. 



